Strategic Methods for Recruiting Grandparents: The Tohoku Medical Megabank Birth and Three-Generation Cohort Study

  • Ishikuro Mami
    Department of Preventive Medicine and Epidemiology, Tohoku Medical Megabank Organization, Tohoku University Environment and Genome Research Center, Tohoku University Graduate School of Medicine
  • Obara Taku
    Department of Preventive Medicine and Epidemiology, Tohoku Medical Megabank Organization, Tohoku University Environment and Genome Research Center, Tohoku University Graduate School of Medicine Department of Pharmaceutical Sciences, Tohoku University Hospital
  • Osanai Tamae
    Department of Preventive Medicine and Epidemiology, Tohoku Medical Megabank Organization, Tohoku University
  • Yamanaka Chizuru
    Department of Preventive Medicine and Epidemiology, Tohoku Medical Megabank Organization, Tohoku University
  • Sato Yuki
    Department of Preventive Medicine and Epidemiology, Tohoku Medical Megabank Organization, Tohoku University Environment and Genome Research Center, Tohoku University Graduate School of Medicine
  • Mizuno Satoshi
    Department of Preventive Medicine and Epidemiology, Tohoku Medical Megabank Organization, Tohoku University Environment and Genome Research Center, Tohoku University Graduate School of Medicine
  • Miyashita Masako
    Department of Preventive Medicine and Epidemiology, Tohoku Medical Megabank Organization, Tohoku University
  • Kikuya Masahiro
    Department of Preventive Medicine and Epidemiology, Tohoku Medical Megabank Organization, Tohoku University Environment and Genome Research Center, Tohoku University Graduate School of Medicine
  • Sakurai Kasumi
    Environment and Genome Research Center, Tohoku University Graduate School of Medicine
  • Hozawa Atsushi
    Department of Preventive Medicine and Epidemiology, Tohoku Medical Megabank Organization, Tohoku University
  • Tomita Hiroaki
    Department of Preventive Medicine and Epidemiology, Tohoku Medical Megabank Organization, Tohoku University Disaster Medical Science Division, International Research Institute of Disaster Science, Tohoku University
  • Taki Yasuyuki
    Department of Nuclear Medicine and Radiology, Institute of Development, Aging and Cancer, Tohoku University Department of Community Medical Supports, Tohoku Medical Megabank Organization, Tohoku University
  • Nagami Fuji
    Department of Public Relations and Planning, Tohoku Medical Megabank Organization, Tohoku University
  • Metoki Hirohito
    Department of Community Medical Supports, Tohoku Medical Megabank Organization, Tohoku University Division of Public Health, Hygiene and Epidemiology, Tohoku Medical and Pharmaceutical University
  • Kuriyama Shinichi
    Department of Preventive Medicine and Epidemiology, Tohoku Medical Megabank Organization, Tohoku University Environment and Genome Research Center, Tohoku University Graduate School of Medicine Disaster Medical Science Division, International Research Institute of Disaster Science, Tohoku University

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Abstract

<p>Involvement of family members, especially grandparents, in genome epidemiological research is important to investigate both genetic and environmental factors of common diseases. The aim of the present study was to establish strategies to obtain enough number of family recruitment, especially focusing on grandparents, for the Tohoku Medical Megabank Birth and Three-Generation Cohort Study. Our main strategies are summarized below. 1) We standardized informed consent process with reference materials to help people understand the consent form, 2) we created an invitation letter to contact family members, and 3) we recruited family members in several settings. To obtain informed consent, we were careful of explaining clearly the complex reasons as well as drawing people’s attention. By the end of March 2017, the number of invitation letters distributed to family members through the pregnant women was 23,806, including 18,702 grandparents. Among the grandparents who received invitation letters, 2,935 (15.7%) responded to us. Furthermore, some grandparents were asked to provide informed consent with other family members by staff at maternal clinics or Community Support Centers, and others directly booked Community Support Centers without responding to the invitation letter. Grandparents joined the study anytime during mother’s maternal check-ups or delivery. Overall, 8,054 grandparents participated in our birth cohort study. The setting in which most grandparents were recruited was our own facilities. Importantly, both paternal and maternal grandparents more frequently participated in the study if the father also participated. In conclusion, we are able to recruit not only pregnant women but also fathers and grandparents.</p>

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